CN219262691U

CN219262691U - Lubricating oil cooling system and compressor

Info

Publication number: CN219262691U
Application number: CN202223286388.5U
Authority: CN
Inventors: 王淑玲; 李海港; 付猛; 王升杰
Original assignee: Gree Electric Appliances Inc of Zhuhai
Current assignee: Gree Electric Appliances Inc of Zhuhai
Priority date: 2022-12-07
Filing date: 2022-12-07
Publication date: 2023-06-27
Anticipated expiration: 2032-12-07

Abstract

The utility model provides a lubricating oil cooling system and a compressor, wherein the system comprises: the cooling assembly comprises a cooling tank, wherein the cooling tank is provided with an input pipeline and an output pipeline, the input pipeline is connected with a refrigerant medium outlet of the evaporator, and the output pipeline is connected with an air suction pipe of the compressor, which is communicated with the compression cavity; and the lubricating oil circulation assembly comprises a circulation oil pipe, the circulation oil pipe penetrates through the cooling tank, the output end of the circulation oil pipe is communicated with the area where the friction pair of the compression part in the compression cavity is located, and the input end of the circulation oil pipe is communicated with an oil pool of lubricating oil. According to the technical scheme, the lubricating oil in the compressor is led out to the external pipeline structure by utilizing the pipeline design, so that the lubricating oil is cooled by the refrigerant, and the cooled lubricating oil returns to the compression part in the compressor, so that the lubricating effect can be improved, and the influence of friction heat on the lubricating effect can be overcome.

Description

Lubricating oil cooling system and compressor

Technical Field

The utility model relates to the technical field of compressors, in particular to a lubricating oil cooling system and a compressor.

Background

The vortex compressor has the characteristics of simple structure, small volume, light weight, low noise, high mechanical efficiency, stable operation and the like. With the progress of science and technology, the scroll compressor is advanced toward higher speed, which also poses a serious challenge to the reliability of the scroll compressor. The high speed makes the working environment of each friction pair in the scroll compressor worsen, for example, at the sliding surface of the movable scroll tooth bottom and the fixed scroll tooth top, the relative movement of the two parts is quickened due to the high running frequency, the high-frequency friction generates high temperature, and the high temperature reduces the viscosity of the lubricating oil, namely the lubricating effect is reduced. Over time, the contact surface between the two parts will wear, and the friction power consumption that produces gradually increases, and light then leads to the energy efficiency of compressor to reduce, and heavy then causes the destruction of other spare parts of compressor because of the aggravation of both wearing and tearing to influence the reliability of compressor. Meanwhile, experimental results and feedback of practical application also prove that under the working condition of high-speed operation, the abrasion problem of the sliding surfaces of the movable vortex plate and the fixed vortex plate is more remarkable.

The utility model provides a dynamic and static disc sliding surface lubrication control system which consists of a compressor shell external lubrication channel structure, a system part air suction cooling structure, an oil temperature testing device and a control valve, wherein the temperature measuring device of the system can measure the temperature of lubricating oil at the bottom of a lower cover pool, when the oil temperature exceeds a set value, the control valve is opened, so that part of low-temperature air suction refrigerant introduced by an evaporator cools the lubricating oil, the temperature of the lubricating oil is reduced, the viscosity of the lubricating oil is improved, the abrasion is reduced, the reliability of the compressor is improved, and meanwhile, the lubrication system is provided with a throttling structure for controlling the lubricating oil quantity.

Disclosure of Invention

In order to solve the problem that the temperature of lubricating oil is increased to influence the lubricity due to heat generated by friction in a compressor in the prior art, the utility model provides a lubricating oil cooling system and the compressor.

In a first aspect, the present utility model provides a lubricating oil cooling system, including:

the cooling assembly comprises a cooling tank, wherein the cooling tank is provided with an input pipeline and an output pipeline, the input pipeline is connected with a refrigerant medium outlet of the evaporator, and the output pipeline is connected with an air suction pipe of the compressor, which is communicated with the compression cavity; and

the lubricating oil circulation assembly comprises a circulation oil pipe, the circulation oil pipe penetrates through the cooling tank, the output end of the circulation oil pipe is communicated with the area where the friction pair of the compression part in the compression cavity is located, and the input end of the circulation oil pipe is communicated with an oil pool of lubricating oil.

In one embodiment, the method further comprises:

the temperature detection assembly is arranged at the oil pool and is electrically connected with the electromagnetic valve arranged on the input pipeline and the output pipeline respectively.

In one embodiment, the output and/or input of the circulation oil pipe is provided with a throttle pin having a throttle passage with a reduced inner diameter compared to the circulation oil pipe.

In one embodiment, the two ends of the throttling pin are respectively provided with a first oil groove and a second oil groove, the outer peripheral surface of the throttling pin is provided with a third oil groove, and the inner parts of the two ends of the throttling pin are respectively provided with a first oil hole and a second oil hole which extend along the radial direction;

the first oil hole communicates the first oil groove with one end of the third oil groove, and the second oil hole communicates the second oil groove with the other end of the third oil groove, so as to form the throttle passage.

In one embodiment, the third oil groove has a spiral structure spirally wound on an outer peripheral surface of the throttle pin.

In one embodiment, one end of the throttle pin has a connecting portion with a reduced outer diameter, which can be sealingly inserted into the nozzle of the circulation oil pipe.

In one embodiment, the circulating oil pipe is provided with a circulating oil pump.

In a second aspect, the present utility model provides a compressor, including the above-mentioned lubricating oil cooling system, further having all the technical effects provided by the system.

In one embodiment, an internal circulation oil path communicated with the area where the friction pair of the compression part is located is arranged inside the internal circulation oil path, a plurality of oil pools are arranged on the internal circulation oil path, and at least one oil pool is communicated with the circulation oil pipe.

In one embodiment, the device is provided with an assembly groove for installing a throttle pin on the input end and the output end of the circulating oil pipe, and a channel which is surrounded by a third oil groove on the outer peripheral surface of the throttle pin and the groove wall of the assembly groove is used as a part of the throttle channel.

The above-described features may be combined in various suitable ways or replaced by equivalent features as long as the object of the present utility model can be achieved.

Compared with the prior art, the lubricating oil cooling system and the compressor provided by the utility model have the following beneficial effects:

according to the lubricating oil cooling system and the compressor, the lubricating oil in the compressor is led out to the external pipeline structure by utilizing the pipeline design, so that the lubricating oil is cooled by the refrigerant, the cooled lubricating oil returns to the compression part in the compressor, the lubricating effect can be improved, and the influence of friction heat on the lubricating effect is overcome.

Drawings

The utility model will be described in more detail hereinafter on the basis of embodiments and with reference to the accompanying drawings. Wherein:

FIG. 1 is a schematic view showing the overall structure of the cooling system and compressor assembly structure of the present utility model;

FIG. 2 shows a cross-sectional view of the structure shown in FIG. 1;

FIG. 3 shows an enlarged partial view of the throttle pin portion of FIG. 2;

FIG. 4 shows a block diagram of the profile of the throttle pin member of FIG. 2;

FIG. 5 shows a schematic view of another assembled configuration of the cooling system and compressor of the present utility model;

fig. 6 shows a schematic view of another assembly structure of the cooling system and the compressor of the present utility model.

In the drawings, like parts are designated with like reference numerals. The figures are not to scale.

Reference numerals:

the cooling device comprises a 1-cooling component, a 11-cooling tank, a 12-input pipeline, a 13-output pipeline, a 14-electromagnetic valve, a 15-evaporator, a 16-condenser, a 2-circulating oil pipe, a 21-throttle pin, a 211-first oil groove, a 212-second oil groove, a 213-third oil groove, a 214-first oil hole, a 215-second oil hole, a 216-sealing groove, a 217-connecting part, a 3-temperature detection component, a 4-compressor, a 41-oil tank, a 42-air suction pipe, a 43-movable scroll, a 44-fixed scroll, a 441-first channel and a 442-second channel.

Detailed Description

The utility model will be further described with reference to the accompanying drawings.

Example 1

An embodiment of the present utility model provides a lubricating oil cooling system including:

the cooling assembly 1 comprises a cooling tank 11, wherein the cooling tank 11 is provided with an input pipeline 12 and an output pipeline 13, the input pipeline 12 is connected with a refrigerant medium outlet of the evaporator 15, and the output pipeline 13 is connected with an air suction pipe 42 of the compressor 4, which is communicated with a compression cavity; and

the lubricating oil circulation assembly comprises a circulation oil pipe 2, the circulation oil pipe 2 penetrates through a cooling tank 11, the output end of the circulation oil pipe 2 is communicated with the area where friction pairs of compression parts (a movable vortex disc and a static vortex disc) in a compression cavity are located, and the input end of the circulation oil pipe is communicated with an oil pool 41 of lubricating oil.

Specifically, as shown in fig. 1 and 2 of the drawings, the lubricating oil cooling system of the present utility model uses the circulation oil pipe 2 of the lubricating oil circulation assembly to guide out the lubricating oil inside the compressor 4 to the outside, and then uses the cooling tank 11 of the cooling assembly 1 to exchange heat with the circulation oil pipe 2, thereby achieving cooling of the lubricating oil. The cooling unit 1 of the present utility model mainly supplies the cooling source by means of the evaporator 15 and the condenser 16 which are originally provided in the compressor 4. Specifically, a part of the refrigerant outputted from the evaporator 15 enters the compression chamber through the suction pipe 42, and another part enters the cooling tank 11 through the input line 12, and then enters the suction pipe 42 through the output line 13, thereby finally also entering the compression chamber.

In addition, according to practical situations, there may be a plurality of oil tanks 41 inside the compressor 4, and then the circulating oil pipe 2 may be connected to one of the oil tanks 41, or may be connected to a plurality of oil tanks 41 simultaneously.

Preferably, the circulation oil pipe 2 is provided with a circulation oil pump. A circulation oil pump (not shown in the drawings) powers the circulation of the lubricating oil. And the circulation of the refrigerant is spontaneously driven by the pressure difference of the discharge gas during the operation of the compressor.

Further, the method further comprises the following steps: and a temperature detection assembly 3 disposed at the oil sump 41, the temperature detection assembly 3 being electrically connected to solenoid valves 14 disposed on the input line 12 and the output line 13, respectively.

Specifically, as shown in fig. 1 and 2 of the accompanying drawings, the temperature detection assembly 3 is used for matching with the electromagnetic valve 14 to realize automatic cooling of lubricating oil. The temperature detecting unit 3 can judge whether cooling is needed according to the oil temperature in the oil pool 41, and if so, the battery valve is controlled to be opened, and the refrigerant can spontaneously circulate into the cooling tank 11 under the action of pressure difference. In addition, if there are a plurality of oil sumps 41, the temperature detecting unit 3 may be provided with a plurality of detecting ends corresponding to the plurality of oil sumps 41, so that it is possible to determine whether or not circulation cooling is required and which oil sump 41 should be circulated according to the temperature conditions of the plurality of oil sumps 41.

Further, the temperature at the oil sump 41 is detected instead of directly detecting the temperature at the compression part because the lubricating oil itself needs to circulate between the compression part and the oil sump 41, and the temperature at the compression part must be relatively high due to frictional heat generation, so if the temperature at the compression part is directly detected, it may occur that the temperature at the compression part is out of specification, but the temperature of the oil sump 41 is not out of specification, at this time, cooling is not necessary because the lubricating oil whose temperature in the oil sump 41 is up to specification is subsequently introduced at the compression part. The direct detection of the temperature at the compression element cannot represent the overall temperature condition of the lubricating oil and is not representative, so the detection of the temperature of the oil pool 41 is employed.

Further, the output end and/or the input end of the circulation oil pipe 2 is provided with a throttle pin 21, and the throttle pin 21 has a throttle passage with a smaller inner diameter than the circulation oil pipe 2.

Specifically, the throttle passage is mainly used for controlling the flow rate and the flow velocity of the lubricating oil of the circulating oil pipe 2, because the lubricating oil has a certain viscosity and a certain hysteresis in flowing, if the flow area is large, the problem that the local fluidity cannot be kept up easily is generated under the driving of external power, and the local vacuum is caused. In addition, the lubricating oil is prevented from being excessively fast in flow velocity at the compression part under the driving of external power, so that the lubricating effect is influenced; and prevents the condition that the oil supply is excessive or the back pressure of the actuation scroll 43 is insufficient due to the excessive oil supply pressure during high-speed operation.

Further, the two ends of the throttle pin 21 are respectively provided with a first oil groove 211 and a second oil groove 212, the outer peripheral surface of the throttle pin is provided with a third oil groove 213, and the two ends of the throttle pin 21 are respectively provided with a first oil hole 214 and a second oil hole 215 which extend along the radial direction; the first oil hole 214 communicates the first oil groove 211 with one end of the third oil groove 213, and the second oil hole 215 communicates the second oil groove 212 with the other end of the third oil groove 213 to form a throttle passage.

Preferably, the third oil groove 213 is a spiral structure spirally wound on the outer peripheral surface of the throttle pin 21.

Specifically, as shown in fig. 3 and 4 of the drawings, by using different oil grooves formed at different positions of the throttle pin 21, particularly the third oil groove 213 spirally wound on the outer circumferential surface, a throttle passage having a sufficient path can be formed in a limited space, and the control effect on the flow rate and the flow velocity of the lubricating oil can be sufficiently achieved.

Further, a seal groove 216 is provided on the outer peripheral surface of the throttle pin 21, and the seal groove 216 is used for mounting a seal ring, thereby realizing a sealed connection with the compressor 4.

Preferably, one end of the throttle pin 21 has a connecting portion 217 of reduced outer diameter, and the connecting portion 217 can be sealingly inserted into the nozzle of the circulation oil pipe 2.

Example 2

Embodiments of the present utility model provide a compressor including a lubricant cooling system; the compressor has an internal circulation oil path communicating with a region where the friction pair of the compression element is located, and the internal circulation oil path has a plurality of oil sumps 41, and at least one oil sump 41 communicates with the circulation oil pipe 2.

Specifically, as shown in fig. 2 of the accompanying drawings, the compression chamber of the compressor 4 is located at the top, an internal circulation oil path is formed from top to bottom inside the compressor 4, and further, the plurality of oil tanks 41 are also distributed from top to bottom, and the temperature of the lubricating oil can be different at different oil tanks 41 in the circulation process, so that at least one oil tank 41 can be selected to be communicated with the circulation oil pipe 2 according to actual conditions for circulation cooling.

As shown in fig. 2 of the drawings, the lubricant in the upper tank 41 in the compressor 4 can be circulated and cooled, and the upper tank 41 is close to the compression part, and the temperature of the upper tank 41 is generally higher than that of the lower tank 41, so that the upper tank 41 can be cooled in a targeted manner, and part of the lubricant also enters the lower tank 41, thereby directly ensuring that the temperature of the lower tank 41 is at a lower level. Of course, according to the actual situation, the lubricating oil in the lower oil pool 41 may be circulated and cooled by the method shown in fig. 5.

Further, the compressor has an assembly groove for mounting the throttle pin 21 on the input end and the output end of the circulation oil pipe 2, and a passage surrounded by the third oil groove 213 on the outer peripheral surface of the throttle pin 21 and the groove wall of the assembly groove together is used as a part of the throttle passage.

Specifically, the assembly groove is mainly formed on the fixed scroll 44 of the compressor 4, and the assembly groove may be a structure with a lateral radial layout as shown in fig. 2 of the accompanying drawings or a structure with a top axial layout as shown in fig. 6 of the accompanying drawings. The fixed scroll 44 is further provided with a first channel 441 and a second channel 442 which are communicated with the assembly groove, and the first channel 441 and the second channel 442 are communicated with the contact surface between the fixed scroll 44 and the movable scroll 43.

In the description of the present utility model, it should be understood that the terms "upper," "lower," "bottom," "top," "front," "rear," "inner," "outer," "left," "right," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the present utility model and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be configured and operated in a particular orientation, and thus should not be construed as limiting the present utility model.

Although the utility model herein has been described with reference to particular embodiments, it is to be understood that these embodiments are merely illustrative of the principles and applications of the present utility model. It is therefore to be understood that numerous modifications may be made to the illustrative embodiments and that other arrangements may be devised without departing from the spirit and scope of the present utility model as defined by the appended claims. It should be understood that the different dependent claims and the features described herein may be combined in ways other than as described in the original claims. It is also to be understood that features described in connection with separate embodiments may be used in other described embodiments.

Claims

1. A lubrication oil cooling system, comprising:

2. The lube oil cooling system of claim 1, further comprising:

3. The lubricating oil cooling system according to claim 1, wherein the output and/or input of the circulation oil pipe is provided with a throttle pin having a throttle passage with a reduced inner diameter than the circulation oil pipe.

4. The lubricating oil cooling system according to claim 3, wherein the throttle pin has a first oil groove and a second oil groove at both ends thereof, and a third oil groove on the outer peripheral surface thereof, and a first oil hole and a second oil hole extending in the radial direction are provided in the inside of both ends of the throttle pin, respectively;

5. The lubricating oil cooling system according to claim 4, wherein the third oil groove is a spiral structure spirally wound on an outer peripheral surface of the throttle pin.

6. A lubricating oil cooling system according to claim 3, wherein one end of the throttle pin has a connecting portion of reduced outer diameter which can be sealingly inserted into the nozzle of the circulation oil pipe.

7. The lubricating oil cooling system according to claim 1, wherein a circulating oil pump is provided on the circulating oil pipe.

8. A compressor comprising the lubricating oil cooling system according to any one of claims 1 to 7.

9. The compressor of claim 8, wherein an internal circulation oil path communicating with a region where a friction pair of the compression member is located is provided in the compressor, the internal circulation oil path having a plurality of oil sumps thereon, at least one of the oil sumps communicating with the circulation oil pipe.

10. A compressor according to claim 8 or 9, wherein there is provided an assembling groove for mounting a throttle pin on an input end and an output end of the circulation oil pipe, and a passage defined by a third oil groove on an outer peripheral surface of the throttle pin and a groove wall of the assembling groove together is provided as a part of the throttle passage.